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Old 08-02-2002, 02:03 AM
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How do you recommend that I apply POR-15 inside rocker panels and other auto body panels where the inner cavity is barely accessible except via a small hole? I considered inserting a spray tube, eg. from a garden sprayer, but POR-15 application instructions warn against letting it pool. There must be a way to get it into such spaces, but I haven't discovered it. Thanks for any advice you can offer.
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Old 08-02-2002, 04:12 PM
Dan Rotigel
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I'm going out on a limb here, but I thought por-15 was a coating for body repair, and it sounds like you are doing rust proofing. I would reccomend taking the car to a rust proofing shop. It should come in well under 200 dollars, with a 45 dollar 'touch-up' charge every 2 years or so to keep it in the best condition. Just my .02. For an good set of directions on por-15, check out and check out the tech section. The site is volvo based, but the same idea applies.

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Old 08-02-2002, 11:24 PM
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Location: Vernon, CT
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POR-15 is great stuff. Are you using this as a rustproofing or is there definetly rust that you are covering. POR-15 is meant for rusted metal. If it's too be used on clean metal, the metal has to be prepped with their "Metal-clean". Also, since you can't really see inside the rockers, it would be impossible to see if everything got covered. If you have never used this stuff before, let me give you a heads up. Anything, and I mean anything, that you use to apply the stuff will be ruined. You will not be able to clean out a brush or anything, once this stuff starts to dry. I had a brush that hardened so much, I was able to use the brush to cut into a piece of pine. Nothing will clean/dislove this stuff. I even let the brush soak in gasoline for over a week, and it did nothing. So if you use a garden nozzle, kiss it good bye.
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Old 08-03-2002, 12:19 AM
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Join Date: May 2002
Location: Mass
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Rick is on the right track. POR 15 is not suitable for "blind' rustproofing. It does not stick to painted or coated metal at all, or loose rust. I have used this stuff extensively on bare metal, and it is a very good primer.
You want something like Waxoyl or Rusfre.
These are soft waxy coatings that can go right over anything that might be inside those cavities, and can be applied with ordinary pneumatic 'rustproofing' spray equipment.
1986 300E 5-Speed 240k mi.
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Old 08-05-2002, 11:57 AM
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Thank you for these thoughtful and very helpful responses. Much appreciated.

Wendell Brase
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